Background job executes very slow with HF server hosted on IIS Express

I am testing our solutions in Visual Studio. Hangfire server is run hosted on IIS Express. When I invoke a long-running background job execution, I notice a strange thing: during job method code execution, it is suddenly abandoned (after a minute or couple) and during a long time - 20-30 mins - nothing happens, I see only heartbeats in the host log. Then the code execution continues…